Synergistic effect of a combination of granulocyte macrophage colony-stimulating factor and thymosin ???±1 on Lewis lung cancer transplanted tumor in mice

摘要

Purpose: To study the synergistic effect of a combination of granulocyte-macrophage colony-stimulating factor and thymosin-α1 on the treatment of Lewis lung cancer transplanted tumor. Methods: C57BL/6 mice were used. A mouse model of Lewis lung cancer was established using Lewis lung cancer cell lines. The mice were randomly divided into blank control group, polyene taxol (DTX) group, DTX thymosin α1 (Tα-1) group, and DTX granulocyte-macrophage colony-stimulating factor (GM-CSF) group, with 8 mice per group. The degree of tumor inhibition, thymus mass, thymus index, spleen mass, spleen index, IL-6, TNF-1, IFN-1, CD4 + , CD8 + T cells and the ratio of CD4 + /CD8 + were determined by ELISA and flow cytometry. Results: Body mass, thymus mass, thymus index, spleen mass, spleen index, IL-6, TNF-1, IFN-1, CD4 + , CD8 + T cells and the ratio of CD4 + /CD8 + in DTX + Tα-1 group, DTX + GM-CSF group and DTX + Tα-1 + GM-CSF group were significantly elevated (p 0.05), relative to the corresponding levels in DTX mice (p 0.05). Body mass, degree of tumor inhibition, thymus mass, thymus index, spleen mass, spleen index, IL-6, TNF-1, IFN-1, CD4, CD8 T cells and CD4 + /CD8 + ratio in DTX + Tα-1 + GM-CSF mice were significantly elevated, relative to the DTX + Tα-1 and DTX + GM-CSF groups (p 0.05). The state of the tumor was significantly improved in the DTX + Tα-1 and DTX + GM-CSF mice. Conclusion: A combination treatment of GM-CSF, Tα-1 and DEX effectively enhances the resistance of mice and suppresses chemotherapy-induced decrease in body weight. This finding may be of clinical significance.